Improvement in lamps



WILLIAMMULLALLY OF BOSTON, MASSACHUSETTS;

Letters Patent- No. 74,403, dated February 11, 1868.

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TO ALL PERSONS TQWHOM, THESE PRESENTS MAY COME:

Be it known that I, WILLIAM MULLALLY, of Boston, in the county of Suffolk, and State of Massachusetts, have made a new and useful invention, having reference to Lamps for Burning Liquid Hydrocarbons; and I do hereby declare the same to be fully described in the following specification, and represented in the accompanying drawings, of which 7 Figure 1 denotes a top view,

Figure 2 a side elevation, and

Figure 3 a vertical section of a lamp-burner provided with my invention.

In such drawings, the wicktube-of the burner is represented at A as concentric with the inverted bellshaped burner-body B. This body is foraminous, or made with numerous air-inlets or perforation, a a, and is supported on, fixed to, and projects upward from, a hollow base, 0, which sustains the wick elevatorlD and its shaft, 6, andiis formed with amale screw, 0, to screw into the neck or cap of the reservoir of a lamp. The wick-tube A is fixed to and projects through the said base. i V V There extends downward from the upper edge of the body B, and concentric ther'ewith, a chimney expansive and elastic base-supporter, E, consisting of a. series of thin springs, arranged in, a circle with respect to each other, and projecting down from the circumference of the upper edge of the body B, or from a thin annu- 1us,d, encompassing and extending from the said circumfernqthe whole being as shown in the drawings. There are one or moreair-passagea e, made between each two of such springs", such passage or passages being to allow air to pass, through the chimneysupporter, into the chimney, and over the cone or air-deflector F, which rests directly on the top of the body B, or on the annulus d. Studs'or projections, ff, extending downfrom the base of the cone, and passing into slots, 9 g, in the annulus, serve to maintain the cone in its normal or correct position with respect to the bas'ei V i i Each of the springs of the chimney-supporter is curved or flanged, as shown at h, to support'the lower end or base of the chimney, underneath which the extension]; projects, while the spring bears against the inner surihce of the chimney just above its base. i p

The chimney-supporter, by its expansive properties, fits closely to the chimney when the latter is crowded down upon it, and thus not only supports the chimney at its base, but also on its inner surfacc, so as to hold it down on the base with friction. It also enables air to pass into the chimney in the quantity necessary, and, as there willbe little contraction of the base-supporter when any chimney is fitted to it, the amount of air allowed to flow through the openings between the springs will generally be about the same.

The chimney-supporter is designed to sustain a glass chimney, cylindrical, or about so, in form, at and near its base or bottom. It is well known that such chimneys, of any particular size in the market, gcnerallyhave small diametric variations; that is, one will be a trifle larger in diameter than another, or not be blown. or formed exactly cylindrical on the inner surface of its base. My improved chimney-supporter will receive any chimney of the size designed for it, whatever may be the small diametric variation of it with respect to another of like size, the term fsize thus used being a technical one.

The air for the supply of the wick passes up through the pcriorated body B, and into the cone, without impinging against the chimney until after it may have passed through the flame-passage of the cone.

I am aware of the burner described in the United States Patent, No. 49,984, dated September 19, 1855, in which the air-deflector is elevated above the base-supporter of the chimney, so that the chimney may extend below the deflector, and between it and the base-supporter, the chimney being held in place by the cone and a series of peripheral springs projecting therefrom. My invention difl'ers materially therefrom, as with it there is no elevation of the cone, so that the lightdfrom the flame can pass underneath the air-deflector, and thence through the chimney; and, besides, I do not support the chimney by peripheral springs, attached to the cone, and bearing against the chimney one inch or more above its base. My chimney-supporter, form-ed of peripheral springs,and extending therefrom, sustains the chimney at and above its base at one and the same time, and also allows air to pass into the chimney in regulated quantities suihcient fo r the flame when projecting above the cone. Furthermore, with my improved burner, the chimney is maintained at so low a temperature at its lower as represented.

part as to be easily removed from the burner by the bend or thumb and index finger of a person applied directly tosuch lower part, that is, whenever it may be desirable to do so in order to gain access to the wick for the purpose of trimming it. I i 7 v I claim the chimney expansive and elastic base-supporter;constructed substantially in manner and so as to operate substantially as described. l I

I also claim the combination as well as'the arrangement, as explained, of the chimney expansive and elastic base-support and its air-passages with the foraminous or perforated burner-body and trick-tube.

I also claim the combination as well as the arrangement of the chimney expansive and elastic basesupporter with the cone or air-deflector, the wick-tub'eflmd the perfomted'or foraminous burner-body, arranged v WILLIAM MULLALLYi Witnesses: I

R. H. EDDY,

SAMUEL N. PIPER. 

